65 lines
4.0 KiB
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65 lines
4.0 KiB
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Connection Window
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.. image:: ./images/ConnectionWindow.png
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The connection window is used to add, remove, and modify connections. At the moment it is possible
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to use any QT SerialBus compatible device and any GVRET compatible device in any of the supported
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operating systems. SerialBus supports socketcan on linux, passthrough on Linux and Windows 32
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bit, and Vector, PeakCAN, and TinyCAN on supported OS's.
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At this time GVRET compatible devices are: EVTVDue, EVTV CANDue (1.3/2/2.1/2.2),
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Teensy 3.1-3.6, Macchina M2, EVTV ESP32 Due.
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Connecting To A Dongle
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==============================
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SavvyCAN is able to connect to GVRET compatible devices to capture new traffic. These
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devices will present as serial ports on the connected PC.
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To connect to a dongle select the proper serial port and click "Create New Connection".
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If a valid device is found on that serial port the first statusbar section will update
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and the currently set canbus speeds will show in the table at the left of the window.
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These speeds can then be changed by clicking on the speed (or otherwise selecting the cell
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in the table) and typing in a new value. Leaving the cell will update the speed to the new
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value. GVRET devices also support setting "listen only" on each bus. This mode causes the
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device to not acknowledge any traffic or try to modify the bus at all. It is as it says,
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a mode where you can only listen to whatever traffic is found on the bus. Some older GVRET
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devices supported a mode where you could change the second bus between single wire CAN
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and normal CAN. This is deprecated. However, newer GVRET devices have dedicated single
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wire CAN buses and the relevant bus will show the checkbox.
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SavvyCAN can also connect to a wide variety of CAN hardware through the built-in QT
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SerialBus drivers. These drivers vary by operating system but support socketcan on LINUX
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and Vector tools on both LINUX and Windows. When you select "QT SerialBus Devices" you will
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get a list of device types supported. Select a device type and for most devices you should see
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the Port list fill out with all registered and valid ports for that driver. Socketcan devices, for
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instance, are automatically detected now. Then push "Create New Connection" and you should
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see the new connection in the table on the left of the window. Note that SocketCAN devices
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don't support changing the baud rate within a program. You must do this when you set up
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the connection via console commands. This is outside the scope of this documentation.
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Consult the SocketCAN documentation for details on configuring such devices.
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The last connection option is "Remote Host." If you select this option then Port will change
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to a textbox. Enter the IP address of the remote (but still local to your LAN) IP address. Currently
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this works with EVTV ESP32 boards and M2 boards.
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Debugging Connection Problems
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==============================
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GVRET devices present as serial ports and have significant configuration options.
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However, the ability to configure so many things and the ability to compile the firmware
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yourself both come as a double edged sword. They present many opportunities for things
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to go wrong. Because of this there is a debugging console present on the connection window.
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Click a bus in the table then click "Enable Console" to cause it to start logging serial
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traffic. From this console you can see what is going on. It shows what SavvyCAN is sending
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and what it is getting back. It has extended status messages that might help to narrow down
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what is going wrong. Additionally, if you're feeling adventurous you can send traffic to
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the serial device from the Send line. "Send Hex" accepts a set of hex values separated
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by spaces. "Send Text" will send the raw text you type on the line. GVRET traffic is
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ordinarily binary so "Send Text" won't work very well for that. But, there is also a
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text console possible on GVRET devices. If you connect to them with a serial program you can
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configure things via a text console. Type ? and follow it up with some form of line
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ending (Cr, Lf, CrLf, any will work).
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